Configuré Maven 3.0.3 e intenté descargar un proyecto de muestra usando arquetipos con este comando:

mvn archetype:generate -DarchetypeGroupId=org.graniteds.archetypes 
                       -DarchetypeArtifactId=graniteds-tide-spring-jpa-hibernate 
                       -DgroupId=org.example 
                       -DartifactId=gdsspringflex 
                       -Dversion=1.0-SNAPSHOT

(Comando desde este enlace:http: //java.dzone.com/articles/enterprise-ria-spring-3-flex- )

Y recibí este error:

Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.4.1/maven-clean-plugin-2.4.1.pom

[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-clean-plugin:2.4.1: Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-clean-plugin:jar:2.4.1

Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-install-plugin/2.3.1/maven-install-plugin-2.3.1.pom

[WARNING] Failed to retrieve plugin descriptor for org.apache.maven.plugins:maven-install-plugin:2.3.1: Plugin org.apache.maven.plugins:maven-install-plugin:2.3.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-install-plugin:jar:2.3.1
.
.
.
Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading: repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml

[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect

[WARNING] Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect
Downloading: repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml
Downloading: repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml

[WARNING] Could not transfer metadata org.apache.maven.plugins/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect

[WARNING] Could not transfer metadata org.codehaus.mojo/maven-metadata.xml from/to central (repo1.maven.org/maven2): Error transferring file: Connection refused: connect
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 16.479s
[INFO] Finished at: Tue Oct 18 12:44:58 BST 2011
[INFO] Final Memory: 1M/15M
[INFO] ------------------------------------------------------------------------

[ERROR] No plugin found for prefix 'archetype' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (C:\Users\krsl1254\.m2\repository), central (repo1.maven.org/maven2)] -> [Help 1]

Intenté buscar algunas publicaciones similares a esta, pero no pude obtener una respuesta. Intenté cambiar la configuración del proxy en settings.xml pero todavía no funciona. ¿Podrías ayudarme, por favor?